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Notes Payable - Additional Information (Detail) (USD $) | 3 Months Ended | 9 Months Ended |  |
--- | --- | --- | --- | ---
Sep. 30, 2014 | Sep. 30, 2013 | Sep. 30, 2014 | Sep. 30, 2013 | Dec. 31, 2013 | Nov. 30, 2013
Line Of Credit Facility [Line Items] |  |  |  |  |  |
Revolving credit agreement amendment date |  |  | Nov. 12, 2014 |  |  |
Revolving Credit Facility One |  |  |  |  |  |
Line Of Credit Facility [Line Items] |  |  |  |  |  |
Revolving credit line |  |  |  |  |  | $ 10,000,000
Revolving credit agreement maturity date |  |  | Oct. 01, 2015 |  |  |
Credit facility's interest rate, description |  |  | interest was capitalized at the 30 day LIBOR rate plus 3.25% per annum |  |  |
Borrowed under the agreement | 500,000 |  | 500,000 |  | 500,000 |
Additional borrowings available based on the Company's borrowing | 5,700,000 |  | 5,700,000 |  | 7,900,000 |
Interest capitalized | 0 | 0 | 18,000 | 0 |  |
Revolving Credit Facility One | Minimum |  |  |  |  |  |
Line Of Credit Facility [Line Items] |  |  |  |  |  |
Leverage test of total liabilities to total net worth | 1.00 |  | 1.00 |  |  |
Fixed Charge Coverage Ratio | 1.25 |  | 1.25 |  |  |
Net income per quarter |  |  | 1.00 |  |  |
Revolving Credit Facility One | London Interbank Offered Rate (LIBOR) |  |  |  |  |  |
Line Of Credit Facility [Line Items] |  |  |  |  |  |
Credit facility's interest rate, description |  |  | credit facility’s interest rate is London Interbank Offered Rate (“LIBOR”) (0.15% at September 30, 2014) plus 3.25% per annum |  |  |
Credit facility's interest rate |  |  | 0.15% |  |  |
Credit facility, basis spread on variable rate |  |  | 3.25% |  |  |
Commitment fee of the unused portion of the credit |  |  | 0.30% |  |  |
Revolving Credit Facility Two |  |  |  |  |  |
Line Of Credit Facility [Line Items] |  |  |  |  |  |
Revolving credit agreement maturity date |  |  | Oct. 01, 2017 |  |  |
Exclusion of capital expenditure from fixed charge coverage ratio | 4,900,000 |  | 4,900,000 |  |  |
Net income waived |  |  | $ 1.00 |  |  |
Revolving Credit Facility Two | London Interbank Offered Rate (LIBOR) |  |  |  |  |  |
Line Of Credit Facility [Line Items] |  |  |  |  |  |
Credit facility's interest rate, description |  |  | the interest rate to LIBOR plus 3.00% per annum |  |  |
Credit facility, basis spread on variable rate |  |  | 3.00% |  |  |
Commitment fee of the unused portion of the credit |  |  | 0.40% |  |  |

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